Ink



Patented Dec. "19, 1922.

UNITED STATES PATENT OFFICE.

ALBERT B.'DICK, 01 LAKE FOREST, ILLINOIS, AND EDWARD W. HILL, OF CHIOAGO,

ILLINOIS, ASSIGNORS TO A. B. DICK COMPANY, OF CHICAGO, ILLINOIS, A CORPO- RATION ILLINOIS.

No Drawing. Application filed March 5,

To all whom it may concern:

Be it known that we, .ALBERT B. DICK, residing at Lake Forest, in the county of Lake and State of Illinois, and EDWARD W.

5 HILL, residing at Chicago, in the county of Cook and State of Illinois, both citizens of the United States, have invented certain new and useful Improvements in Ink, of which the following is a specification.

Our invention relates to improvements in ink adapted particularly for use upon stencil duplicating machines ofthe rotary type wherein is employed a rotary drum or cylinder upon the foraminated periphery of which a stencil is secured, an ink-pad of suit-' able textile material lying between such drum and stencil. Amon the more important requirements of suc an ink are the following :-It should not readily dry or clog upon the pad and yet, when deposited upon impression sheets should quickly set so as to avoid blurring and oil-setting; it should be smooth, soft and capable of ready and uniform distribution; it should be capable of maintaining its integrity throughout an extended period of time and notwithstanding changes in atmospheric conditions, there belng no tendency of the ingredients to separate or of certain thereof to precipitate.

The object of this invention is to provide an ink meeting these requirements as'well as others encountered in the commercial practice of the art.

We have found it advantageous to employ as a vehicle for the pigment or other coloringrmatter a mixture of sulphonated oil such as urkey red oil and a vegetable oil such as rosin oil, these being combined in substantially equal quantities or the rosin oil slightly 40 in excess. We may also advantageously combine with said oils an antiseparation element, such, for example, as soap or the saponified oil commonly known as green soap, this being present in relatively small quantity. By way of example, we have obtained excellent results by employing fifteen INK.

1921. Sam No. 449,911.

parts of combined sulphonated oil and rosin oil, addin solution 0 tained by dissolving one part of green soap in two parts of water (by weight). If desired, the soap in undiluted state may be added if preliminarily brought to liquid orsemi-liquid form by heat. In the vehicle so constituted we grind or mix a suitable pigment or other coloring matter,

for example, for the production of a black ink, carbon black, with, if desired, a small quantity of a toning element such as Milori blue. If desired, we may incorporate in the ink a small quantity (for example, from one to three per cent) of alumina phosphate which has been found to produce beneficial results.

A duplicating ink so made in addition-to meeting essential requirements including those above mentioned is relatively inexpen sive and easily compounded, no manipulation being necessary beyond the mixing and grinding as above set forth. In addition, such an ink may, if desired, be distended in any suitable manner as practiced in the art without sensible loss of efliciency.

We claim:

1. An ink substantially free from glycerin,

containing a coloring matter, sulphonated oil, and a vegetable oil substantially as described. 2. An ink substantially free from glycerin, containing a coloring matter ground in sulphonated oil and a vegetable oil, substantially as described.

3. An ink substantially free from glycerin, containing a coloring matter, sulphonated oil and rosin oil, substantially as described.

4. An ink substantially free from glycerin,

containing coloring matter ground in sulphonated oil and rosin oil, substantially as described.

5. An inkcontaining a coloring matter, sulphonated oil, rosin oil and an anti-separation constituent, substantially as described.

6. An ink containing a pigment ground in thereto one part of green soap tion constituent,

sulphon'at'ed oil,

a coloring matter, and soap, substansubstantially as described.

10. An ink containing a pigment ground in Turkey red 011, IOSlIl 011 and green soap, substantially as described.

11. An ink containing a coloring matter,

jsulphonated oil, rosin oil,soa p and alumina phosphate.

, This specification signed and witnessed this 25th day of February, 1921.

ALBERT B. DICK. EDWARD HILL. Witnesses as to signature/ofv Albert B. Dickz' i I PHILIP A. BURNETT, J W. "J DONOVAN.

ill

JosnPH Trap, W. H. MEEHA Witnesses as to signature of Edward W.- 

